KASAN: use-after-free Read in xfs_buf

Kernel	Title	Repro	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	KASAN: use-after-free Read in xfs_buf_rele	syz	error	3	656d	737d	0/1	upstream: reported syz repro on 2022/12/14 21:15
upstream	KASAN: slab-use-after-free Read in xfs_buf_rele xfs			2	190d	217d	0/28	auto-obsoleted due to no activity on 2024/09/11 19:16
upstream	KASAN: slab-use-after-free Read in xfs_buf_rele (2) xfs			1	22d	12d	0/28	upstream: reported on 2024/12/09 11:23

Created	Duration	User	Patch	Repo	Result
2023/03/03 18:58	22m	bisect fix		linux-4.14.y	OK (0) job log log
2023/02/01 14:29	32m	bisect fix		linux-4.14.y	OK (0) job log log

Created

Duration

User

Patch

Repo

Result

2023/03/03 18:58

22m

bisect fix

linux-4.14.y

OK (0) job log log

2023/02/01 14:29

32m

bisect fix

linux-4.14.y

OK (0) job log log

syz-executor202 (19441): drop_caches: 2 syz-executor202 (19441): drop_caches: 2 XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem ================================================================== BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:259 [inline] BUG: KASAN: use-after-free in rht_head_hashfn include/linux/rhashtable.h:283 [inline] BUG: KASAN: use-after-free in __rhashtable_remove_fast_one include/linux/rhashtable.h:1021 [inline] BUG: KASAN: use-after-free in __rhashtable_remove_fast include/linux/rhashtable.h:1101 [inline] BUG: KASAN: use-after-free in rhashtable_remove_fast include/linux/rhashtable.h:1130 [inline] BUG: KASAN: use-after-free in xfs_buf_rele+0x123c/0x12a0 fs/xfs/xfs_buf.c:1063 Read of size 4 at addr ffff8880a24fc58c by task syz-executor202/19445 CPU: 1 PID: 19445 Comm: syz-executor202 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:429 rht_key_hashfn include/linux/rhashtable.h:259 [inline] rht_head_hashfn include/linux/rhashtable.h:283 [inline] __rhashtable_remove_fast_one include/linux/rhashtable.h:1021 [inline] __rhashtable_remove_fast include/linux/rhashtable.h:1101 [inline] rhashtable_remove_fast include/linux/rhashtable.h:1130 [inline] xfs_buf_rele+0x123c/0x12a0 fs/xfs/xfs_buf.c:1063 xfs_buftarg_shrink_scan+0x18a/0x270 fs/xfs/xfs_buf.c:1769 do_shrink_slab mm/vmscan.c:401 [inline] shrink_slab+0x535/0xb60 mm/vmscan.c:504 drop_slab_node+0x2b/0x60 mm/vmscan.c:531 drop_slab+0x39/0x70 mm/vmscan.c:542 drop_caches_sysctl_handler+0xc9/0xe0 fs/drop_caches.c:65 proc_sys_call_handler.isra.0+0x1ba/0x340 fs/proc/proc_sysctl.c:598 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1496 [inline] SyS_sendfile64+0x9b/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f452f165be9 RSP: 002b:00007f452f10e2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f452f1f67a0 RCX: 00007f452f165be9 RDX: 0000000020002080 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007f452f1f67ac R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000870 R11: 0000000000000246 R12: 00007f452f1c2ff0 R13: 0031656c69662f2e R14: 7365686361635f70 R15: 00007f452f1f67a8 Allocated by task 19353: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node+0x4c/0x70 mm/slab.c:3689 kmalloc_node include/linux/slab.h:530 [inline] kvmalloc_node+0x46/0xd0 mm/util.c:430 kvmalloc include/linux/mm.h:531 [inline] kvzalloc include/linux/mm.h:539 [inline] bucket_table_alloc+0x3a5/0x5d0 lib/rhashtable.c:217 rhashtable_init+0x3e2/0x7a0 lib/rhashtable.c:995 xfs_initialize_perag+0x174/0x3d0 fs/xfs/xfs_mount.c:218 xfs_mountfs+0xaf4/0x1f40 fs/xfs/xfs_mount.c:821 xfs_fs_fill_super+0xb7a/0x1380 fs/xfs/xfs_super.c:1688 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 Freed by task 7983: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 kvfree+0x45/0x50 mm/util.c:449 rhashtable_free_and_destroy+0x20a/0x710 lib/rhashtable.c:1093 xfs_free_perag+0x9e/0xf0 fs/xfs/xfs_mount.c:164 xfs_unmountfs+0x216/0x5e0 fs/xfs/xfs_mount.c:1149 xfs_fs_put_super+0x62/0x130 fs/xfs/xfs_super.c:1742 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 The buggy address belongs to the object at ffff8880a24fc580 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 12 bytes inside of 512-byte region [ffff8880a24fc580, ffff8880a24fc780) The buggy address belongs to the page: page:ffffea0002893f00 count:1 mapcount:0 mapping:ffff8880a24fc080 index:0xffff8880a24fc800 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a24fc080 ffff8880a24fc800 0000000100000004 raw: ffffea000263df20 ffffea0002887660 ffff88813fe74940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a24fc480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a24fc500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a24fc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a24fc600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a24fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2022/12/24 01:03	linux-4.14.y	c4215ee4771b	9da18ae8	.config	console log	report	syz	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-linux-4-14	KASAN: use-after-free Read in xfs_buf_rele

Crashes (1):

Assets (help?)